Lotus Evora - Door Window, Guide Rails & Lift Mechanism

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Lotus Service Notes Section BV
BV.11 - DOOR WINDOW, GUIDE RAILS & LIFT MECHANISM
WARNING: To ease door closure, and optimise the sealing of the frameless door glass against the
weatherstrips, the control mechanism will automatically drop a fully closed window a small distance
when the door is opened (preparatory to closing), and raise it again after the door is shut. This func-
tion may be triggered, with ignition on or off, by door latching signals. Whenever working on or near
the window mechanism, disconnect the window motor to prevent injury from unexpected operation.
Each door uses a single, 4mm thick, green tinted, tempered glass, curved door window, with a frameless
configuration, and an electrically operated lift mechanism. The glass is guided by a pair of curved steel 'L' sec-
tion channels, to which it is constrained by two pairs of point contact Nylon guide blocks bonded to the front and
rear edges of the glass. The lower end of each of the guide rails is adjustable in/out via a screw mechanism,
to enable the correct weatherstrip seal loading to be achieved, whilst the glass upward travel is limited by an
adjustable stop on the lift mechanism.
The lift mechanism uses a top hat section steel lift channel, curved to match the window guide rails, and
attached to the door shell. An alloy carriage plate, clamped to the bottom of the glass, uses a plastic shoe to
slide along one edge of the lift channel. A multistrand steel cable is attached to the carriage plate and is routed
around a pulley at the top and bottom of the lift channel and then around a drum driven by an electric motor.
The assembly thus described is secured at 3 points to the door shell.
A micro-switch mounted on the lift mechanism closes when the glass is fully raised, and triggers the window
automatic drop function when the door is opened.
Viewed From Outboard
Glass
Guide rail
Upstop adjuster
Plastic shoe
Guide rail
 upperxing
Glass clamp
Carriage plate
Cable winder
drum
Guide rail
b361 Window lift Lift channel adjuster
motor assembly